1. Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan;
2. Department of Translational Pathology, Faculty of Medicine, Hokkaido University, Sapporo, Japan;
3. Department of Pathology, Hokkaido Medical Center, Sapporo, Japan;
4. Department of Pathology, Sapporo City General Hospital, Sapporo, Japan;
5. Department of Cancer Pathology, Faculty of Medicine, Hokkaido University, Sapporo, Japan